"Et område i nord"

Translation: An area in the north

[YannickDeG1]

I would consider " an area up North" correct though, or is there some nuance that I'm missing?

[grydolva]

Added. It's marked as informal in the dictionary, but no doubt:

Headword north. Phrases: up north. Informal , To or in the north of a country:
he’s taken a teaching job up north

[LukaAlien]

Why is just 'nord' considered as 'the north'.
I wrote down 'An area in north', but shouldn't it be like 'norden' or something then?

[grydolva]

Norden is the official name for the Nordic countries, Norway, Sweden, Finland, Iceland, Denmark, Åland and Faroe Islands. Capital N in Norden. Norge, Sverige, Finland, Island, Danmark, Åland og Færøyene.

Magnetic directions are nouns but sort of uncountable. It has but one form, nord. I nord = In the North. Mot nord = To the North. Fra nord = From the North.

[LukaAlien]

Thank you both, I'm not a native English person so I didn't know it was incorrect.

[Luke_5.1991]

"An area in north" is not natural, or possibly not grammatical, on its own.

"An area in North London" = fine.

"An area in north" = unnatural.

[Candidandelion]

"An area in north London": north = adjective.

"An area in the north": north = noun.